expressing a matlab statement

[Ben Abbott]

On Mar 6, 2008, at 4:47 AM, Dr Preyesh T. Goven Shiba wrote:

> Hi
>
> I'm a beginner with the use of matlab and octave... Can someone  
> please help me....How do i express the function y as a amtlab  
> statement for the following expression
>
>
> y^2 - 2y = x + 1
>
> Thankx
> Preyesh

Matlab/Octave are computational applications. Assuming I got the  
algebra correct,

y1 = 1 + sqrt(1 + 4*(1+x));
y2 = 1 - sqrt(1 + 4*(1+x));
y = union(y1,y2);

If  you're looking for a program that will provide a symbolic solution  
(i.e. start with y^2-2y=x+1 and provide an equation representing y),  
take a look at Maxima.

http://maxima.sourceforge.net/

Ben